<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-06-08</periodOfReport>

    <issuer>
        <issuerCik>0002067955</issuerCik>
        <issuerName>Diameter Dynamic Credit Fund</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002134287</rptOwnerCik>
            <rptOwnerName>Abu Dhabi Pension Fund</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>STREET NO. 6 OFF AIRPORT ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>P.O. BOX 3122</rptOwnerStreet2>
            <rptOwnerCity>AL RAWDAH, W58</rptOwnerCity>
            <rptOwnerNonUSStateTerritory></rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>C0</rptOwnerCountry>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED ARAB EMIRATES</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class I Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2026-06-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4990019.96</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.02</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9990019.96</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is being filed by Abu Dhabi Pension Fund (&quot;ADPF&quot;) with respect to securities directly owned by Credit Investment Holding II RSC Limited (the &quot;Subsidiary&quot;), a wholly owned subsidiary of ADPF. As the parent entity of the Subsidiary, ADPF may be deemed to beneficially own the securities directly owned by the Subsidiary. Each of ADPF and the Subsidiary disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, and the filing of this Form 4 shall not be construed as an admission that either of ADPF or the Subsidiary is the beneficial owner of any such shares for purposes of Section 16(a) or Section 13(d) of the Securities Exchange Act of 1934 or for any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Iman AlYazouri</signatureName>
        <signatureDate>2026-06-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
